當我在休眠狀態下使用列表映射一對多映射時，我得到了空值

我正在使用struts2和hibernate。當我在我的程序中實現一對多映射時遇到問題。我從jsp獲得了列表的空值。請幫幫我有代碼：當我在休眠狀態下使用列表映射一對多映射時，我得到了空值

父POJO類是：`

private static final long serialVersionUID = 1L; 
private int id; 
private String voucherno; 
private String vendor_name; 
private String address; 
private Integer vendor_invoice_no; 
private Date invoice_date; 
private Date due_date; 
private Date user_date; 
private String currency; 
private Double exRate; 
private Double totalAmt; 
private Double totalSTex; 
private Double tds_amount; 
private Double s_tax_amount; 
private String tds_section; 
private Double tds_cost; 
private Double tdsamount; 
private Double payable_amount; 
private String narration; 
private List<Payable_datail> recievable_detail ;

孩子POJO類是：

private Integer payable_Id; 
private String chargeHead; 
private String description; 
private Double amount; 
private Double tamount; 
private String st_chargehead; 
private String s_tax_list; 
private String service_tax_category; 
private Double s_tax; 
private Double edu_case; 
private Double high_case; 
private Double total_s_tax; 
private Payable_detaildto payable_detailDto;

父HBM文件是：

<list name="recievable_detail" inverse="false" lazy="true" cascade="all"> 
     <key column="ID" ></key> 
     <index column="index"></index> 
     <one-to-many class="com.envosys.dto.Payable_datail"/> 
     </list>

兒童HBM文件是：

<many-to-one name="payable_detailDto" class="com.envosys.dto.Payable_detaildto" fetch="join" unique="false" update="true" insert="true" optimistic-lock="true" not-found="exception" embed-xml="true"> 
      <column name="ID" /> 
     </many-to-one>

和jsp就是我使用這個列表「recievable_detail」：是

cell0.innerHTML = "<td align='left'><input id='chargeHead"+count+"' name='recievable_detail["+count+"].chargeHead' type='text' value='"+chargehead+"' class='text ui-widget-content ui-corner-all chargeHead' size=50 ' onblur=\"check("+count+")\" ><input type =\"hidden\" id='set_service"+count+"' name = \"set_service\"> "; 
    cell1.innerHTML = "<td align='left'><textarea id='description"+count+"' name='recievable_detail["+count+"].description' type='textarea' rows=\"1\" cols=\"30\" class='text ui-widget-content ui-corner-all'> "; 
    cell2.innerHTML = "<td align='left'><input id='amount"+count+"' name='recievable_detail["+count+"].amount' type='text' value="+amount+" class='text ui-widget-content ui-corner-all' onkeyup='data1()'> "; 
    cell3.innerHTML = "<td align='left'><input id='tamount"+count+"' name='recievable_detail["+count+"].tamount' type='text' value="+tamount+" class='text ui-widget-content ui-corner-all'> "; 
    cell4.innerHTML = "<a onclick=\"removeRow("+count+")\" align=\"center\"><img src=\"images/Minus.png\"/></a></td>";

我的問題是，我無法子類和父類之間進行映射，因爲我得到了名單的價值「recievable_detail」爲空在父類的getter和setter中。請幫助我，給我任何想法和適當的建議給我。

來源

2014-03-07 sumit

所有集合屬性都必須用適當類型的空集合進行初始化;在你的情況下

private List<Payable_datail> recievable_detail = new ArrayList<Payable_datail> ;

來源

2014-03-07 12:00:38

當我在休眠狀態下使用列表映射一對多映射時，我得到了空值

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